Some guys can shoot until their ancient, if he is still reasonably quick and has that dead eye shot, he could be useful coming off screens or hitting open jumpers in transition, and of course spot up Js.

This guy mentions a comeback year after year, but all he is doing is keeping himself in the public eye and keeping himself relevant in the news. Each year he is getting older and his body goes through one more year of wear and tear, there is no more time for him to keep saying these comeback theories unless he is 100% sure this time.